Re: [Bug-apl] inner product

[Juergen Sauermann]

Hi,

yes. Because the first dimension of a is 4 and the last dimension of b is also 4.

/// Jürgen

On 03/17/2017 06:05 PM, address@hidden wrote:

yes last dimension of a must be = to first dimension of b

but then

x←1 2 3 4
y←1 3 3 3

x+.=y   works 


On Fri, 17 Mar 2017 17:29:24 +0100
Juergen Sauermann <address@hidden> wrote:

Hi,

the number of columns in a must match the number of rows in b (or the other way around,
I don't quite remember).

Try:

      a+.=⍉b
3 0 0 0 0
0 3 0 0 0
0 0 3 0 0
0 0 0 3 0
0 0 0 0 3

/// Jürgen


On 03/17/2017 05:17 PM, address@hidden wrote:
Hi

what am i missing here?

a←b←5 3⍴⍳8

a=b

+/a=b

a+.=b     length error